ASTM B168
Ni-Cr-Fe alloy (UNS N06600) plate, sheet and strip
Covers nickel-chromium-iron alloy plate, sheet and strip, including Alloy 600 (UNS N06600) and Alloy 601.
- Plate, sheet & strip
- ASME SB-168
- 1 grade supplied to it
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is ASTM B168?
ASTM B168 is the specification for Ni-Cr-Fe alloy plate, sheet and strip — Alloy 600 (UNS N06600), Alloy 601 (N06601), Alloy 690 (N06690) and related grades. It does not cover Alloy 625 (ASTM B443), Alloy 800 (ASTM B409) or Alloy 825 (ASTM B424), which have their own plate specifications. ASME adopts it as SB-168.
ASTM B168 at a glance
| Alloys | N06600 (600), N06601 (601), N06690 (690) and related Ni-Cr-Fe alloys |
|---|---|
| Products | Plate, sheet and strip |
| General requirements | ASTM B906 |
| ASME designation | SB-168 |
Which plate specification for which nickel alloy?
A common mistake on supplier pages is to list every Inconel grade under B168.
How to write ASTM B168 on a purchase order
Name the product, size, material specification and grade, the dimensional standard and the certificate. An example line:
Illustrative only — sizes, tests, inspection level and any project values come from your purchase specification.
ASTM B168 edition and verification status
Which edition we have confirmed, and what is still being checked before any numerical requirement is published here.
| Current edition | Not yet confirmed against the publisher listing |
|---|---|
| Full-text verification | In progress — numerical requirements are not published on this page |
| Edition on your order | The edition named in your purchase order or design code governs — confirm it with your enquiry |
What to know before ordering to ASTM B168
The points that decide whether material to ASTM B168 is accepted at inspection.
- Material is supplied hot-worked, annealed or as agreed; state the condition.
- Alloy 600 is chosen for high-temperature oxidation and caustic service.
- Seamless pipe and tube in Alloy 600 is ordered to ASTM B167.
Grades and products we supply to ASTM B168
| Grade | Product | Designation on the certificate |
|---|---|---|
| Inconel 600 | Sheet · Plate · Coil | ASTM B168 |
How ASTM B168 fits into an order
A purchase order line is only complete when it names the material standard, the dimensional standard and the inspection document. Miss one and the mill, the inspector and the buyer can each read the order differently.
Standards used with ASTM B168
Same family
ASTM B168 — questions buyers ask
What is ASTM B168?
ASTM B168 is the specification for Ni-Cr-Fe alloy plate, sheet and strip — Alloy 600 (UNS N06600), Alloy 601 (N06601), Alloy 690 (N06690) and related grades. It does not cover Alloy 625 (ASTM B443), Alloy 800 (ASTM B409) or Alloy 825 (ASTM B424), which have their own plate specifications. ASME adopts it as SB-168.
Does ASTM B168 cover Inconel 625 or 825?
No. B168 covers Ni-Cr-Fe alloys such as 600, 601 and 690. Alloy 625 plate is B443 and Alloy 825 plate is B424.
What is Alloy 600 used for?
Heat-treatment furnace parts, chemical processing and caustic service, where its high nickel content resists chloride stress-corrosion cracking and oxidation.
Which grades do you supply to ASTM B168?
Inconel 600 — see the table on this page for the exact product and designation.
What is the difference between ASTM B168 and ASME SB-168?
ASME SB-168 is the ASME Boiler and Pressure Vessel Code (Section II) adoption of ASTM B168. The technical requirements are usually identical to a specific ASTM edition; pressure-equipment codes call for the ASME designation, and most mill certificates show both.
Do you supply certificates to this standard?
Yes. Material is supplied with mill test certificates to EN 10204 3.1 showing the standard, grade and heat number; 3.2 with third-party inspection on request.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026